document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=80616>Question 80616</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height h in feet of an object after t seconds is given by the function<BR>\n" );
document.write( "h=-16t^2+90t+4<BR>\n" );
document.write( "how long will it take the object to hit the grown? Round to the nearest thousandth </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #57807 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=57807\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The height h in feet of an object after t seconds is given by the function<BR>\n" );
document.write( "h=-16t^2+90t+4<BR>\n" );
document.write( "how long will it take the object to hit the grown? Round to the nearest thousandth<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "When it hits the ground its height will be zero.<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "-16t^2+90t+4=0<BR>\n" );
document.write( "-8t^2+45t+2=0<BR>\n" );
document.write( "t=[-45+-sqrt(45^2-4*-8*2)]/-16<BR>\n" );
document.write( "t=[-45+-sqrt(2089]/-4<BR>\n" );
document.write( "t= 5.669 seconds<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );